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Finding the Fourth Proportional to 4,677.57, 7,015.17 and 1,389.90

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Solution

The fourth proportional to 4,677.57, 7,015.17 and 1,389.90 is: 2,084.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,677.57 : 7,015.17 = 1,389.90 : x
  2. Step 2: Convert to fraction form
    4,677.57/7,015.17 = 1,389.90/x
  3. Step 3: Cross multiply
    4,677.57x = 7,015.17 × 1,389.90
  4. Step 4: Simplify right side
    4,677.57x = 9,750,384.78
  5. Step 5: Solve for x
    x = 9,750,384.78/4,677.57
  6. Step 6: Final answer
    x = 2,084.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.